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email_verification.go
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email_verification.go
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package user
import (
"fmt"
"net/url"
"time"
"github.com/coreos/go-oidc/jose"
"github.com/coreos/go-oidc/key"
"github.com/coreos/go-oidc/oidc"
)
// NewEmailVerification creates an object which can be sent to a user
// in serialized form to verify that they control an email address.
// The clientID is the ID of the registering user. The callback is
// where a user should land after verifying their email.
func NewEmailVerification(user User, clientID string, issuer url.URL, callback url.URL, expires time.Duration) EmailVerification {
claims := oidc.NewClaims(issuer.String(), user.ID, clientID, clock.Now(), clock.Now().Add(expires))
claims.Add(ClaimEmailVerificationCallback, callback.String())
claims.Add(ClaimEmailVerificationEmail, user.Email)
return EmailVerification{claims}
}
type EmailVerification struct {
Claims jose.Claims
}
// ParseAndVerifyEmailVerificationToken parses a string into a an
// EmailVerification, verifies the signature, and ensures that
// required claims are present. In addition to the usual claims
// required by the OIDC spec, "aud" and "sub" must be present as well
// as ClaimEmailVerificationCallback and ClaimEmailVerificationEmail.
func ParseAndVerifyEmailVerificationToken(token string, issuer url.URL, keys []key.PublicKey) (EmailVerification, error) {
tokenClaims, err := parseAndVerifyTokenClaims(token, issuer, keys)
if err != nil {
return EmailVerification{}, err
}
email, ok, err := tokenClaims.Claims.StringClaim(ClaimEmailVerificationEmail)
if err != nil {
return EmailVerification{}, err
}
if !ok || email == "" {
return EmailVerification{}, fmt.Errorf("no %q claim", ClaimEmailVerificationEmail)
}
cb, ok, err := tokenClaims.Claims.StringClaim(ClaimEmailVerificationCallback)
if err != nil {
return EmailVerification{}, err
}
if !ok || cb == "" {
return EmailVerification{}, fmt.Errorf("no %q claim", ClaimEmailVerificationCallback)
}
if _, err := url.Parse(cb); err != nil {
return EmailVerification{}, fmt.Errorf("callback URL not parseable: %v", cb)
}
return EmailVerification{tokenClaims.Claims}, nil
}
func (e EmailVerification) UserID() string {
return assertStringClaim(e.Claims, "sub")
}
func (e EmailVerification) Email() string {
return assertStringClaim(e.Claims, ClaimEmailVerificationEmail)
}
func (e EmailVerification) Callback() *url.URL {
return assertURLClaim(e.Claims, ClaimEmailVerificationCallback)
}